CN216943710U

CN216943710U - Plastic bag handle folding device

Info

Publication number: CN216943710U
Application number: CN202220815073.6U
Authority: CN
Inventors: 刘盈华
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-07-12
Anticipated expiration: 2032-04-07

Abstract

The utility model discloses a plastic bag handle folding device, which comprises a rack, wherein a bag bottom stabilizing device for stabilizing the lower half part of a plastic bag and a middle stabilizing device for stabilizing the middle part of the upper half part of the plastic bag are arranged on the rack, the middle stabilizing device and the bag bottom stabilizing device enable two handles of the plastic bag to form vertical bending arrangement respectively, and vertical bending lines of the handles are obliquely arranged relative to the length direction of the plastic bag; and hand stroking plates are respectively arranged on the sides, away from the middle stabilizing device, of the handles on the frame, the hand stroking plates can strok the handles on the corresponding sides to be arranged below the middle stabilizing device, and hand stroking controllers are arranged between the hand stroking plates and the frame. The utility model utilizes the characteristic that the plastic bag is naturally bent, at the same time, the plastic bag is not a part which is stably controlled, or a part which is easy to keep a stable free state without being influenced by external force, has high posture controllability, and is beneficial to improving the folding quality of the plastic bag.

Description

Plastic bag handle folding device

Technical Field

The utility model relates to the technical field of plastic bag folding equipment, in particular to a plastic bag handle folding device.

Background

Portable plastic bags, also known as vest plastic bags, are folded and strapped, usually in stacks, at the end of bag making, for convenient storage, transport and sale. When the plastic bag is folded, the two handles are firstly folded inwards, then the waist of the plastic bag is folded, the two handles are folded at the inner side, and then the folding is carried out for the third time, even for the fourth time. The existing handle folding equipment, such as the utility model patent with the publication number of "CN 212333179U" named as a handle folding device of a plastic bag, the utility model patent with the publication number of "CN 209506301U" named as a head folding device of a plastic bag, and so on, is realized by adopting the mode of laying the plastic bag and folding the handle upwards. The method specifically comprises the following steps: after the plastic bag is conveyed to the folding table by the manipulator, the plastic bag is pressed and held on the folding table by a trapezoidal pressing plate or a structure with the same principle as the trapezoidal pressing plate, then the two folded plates with height difference move towards the plastic bag in sequence, and the two handles are folded upwards in sequence by two waists of the trapezoidal pressing plate respectively; after folding, the end parts of the two handles which are overlapped are pressed and held on the folding table by a pressing and holding structure, so that the two handles are prevented from loosening; and then, downwards pressing a folding indentation at the waist part of the plastic bag, turning by using a folding table, turning and folding the half (namely the upper half part of the plastic bag) where the handle is positioned towards the other half (the lower half part of the plastic bag) by taking the folding indentation as an axis, and keeping the pressing and holding structure to press and hold the handle before the folding is finished.

In the process of applying the folding mode, the inventor finds that the situation that the posture of the handle is messy and the situation that the waist is folded asymmetrically or obliquely always easily occur. The reason that the handle is messy is observed and analyzed as follows: when the folding table is finally turned and folded, in order to avoid the interference between the pressing and holding structure and the table surface where the lower half part of the plastic bag is located, the pressing and holding structure can release the pressing and holding in advance for a small amount of time; in addition, the original pressing structure which is pressed for a certain time is easy to drive the handle of the plastic bag to move to a certain extent when the pressing is released, so that the handle is dropped and loosened before the waist of the plastic bag is completely folded; in addition, the waist fifty percent discount is accomplished in the twinkling of an eye, and the plastic bag inboard position has been equivalent to carried out the action of extruding the air rapidly, and the handle of inboard can receive stronger air current effect, and then has aggravated the condition that the handle is in disorder. The reason why the waist is not folded symmetrically or deflected is that: the plastic bag is different from other materials with better plasticity, the texture is light, the plastic bag is easy to slide, the folding table performs the action of turning and folding, the lower half part of the plastic bag is always in an unconstrained environment and can inevitably move due to the turning action, and then the plastic bag is not folded by the impression of the waist, namely, the situation of asymmetry or deflection occurs after the waist is folded.

In summary, the fundamental reasons for the messy posture of the handle and the asymmetric or oblique folding of the waist are that the posture of some parts of the plastic bag is always uncontrollable in some time periods during the folding process. Therefore, the folding mode needs to be optimized, the folding structure needs to be improved, the posture in the folding process can be controlled in the whole process, and the ideal folding quality is realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a plastic bag handle folding device which has high controllability of the posture in the whole folding process and is beneficial to improving the folding quality of a plastic bag.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the plastic bag handle folding device comprises a rack, wherein a bag bottom stabilizing device for stabilizing the lower half part of a plastic bag and a middle stabilizing device for stabilizing the middle part of the upper half part of the plastic bag are arranged on the rack, the middle stabilizing device and the bag bottom stabilizing device enable two handles of the plastic bag to form vertical bending arrangement respectively, and the vertical bending lines of the handles are obliquely arranged relative to the length direction of the plastic bag; and hand stroking plates are respectively arranged on one sides of the racks, which are far away from the middle stabilizing device, of the handles, the hand stroking plates can be used for stroking the handles on the corresponding sides to be arranged below the middle stabilizing device, and hand stroking controllers are arranged between the hand stroking plates and the racks.

As a preferred technical scheme, the middle stabilizing device comprises a bag top supporting plate which is arranged below the bag bottom stabilizing device and extends to the upper half part of the plastic bag, the bag top supporting plate is provided with a release port for releasing and supporting two handles, and a vertical bending reference edge for positioning a vertical bending line of the handles is arranged at the position, located at the release port, on the bag top supporting plate.

As a preferred technical scheme, the middle stabilizing device comprises a middle stabilizing seat movably mounted on the rack along a direction close to or far away from the bag bottom stabilizing device, a middle first clamping finger positioned below the upper half part of the plastic bag is movably mounted on the middle stabilizing seat, a middle second clamping finger is mounted on the rack above the upper half part of the plastic bag, and the middle second clamping finger and the middle first clamping finger can clamp and fix the middle of the upper half part of the plastic bag; a middle clamping driver is arranged between the middle second clamping finger and the rack, and a middle stable feeder is arranged between the middle stable seat and the rack.

According to the preferable technical scheme, a handle end stabilizing device for stabilizing the end parts of the two folded handles is arranged on the frame, and handle end stabilizing and avoiding openings corresponding to the handle end stabilizing devices are respectively arranged on the two hand smoothing plates.

As a preferable technical scheme, a hand stroking feeding seat movably mounted in a direction close to or far away from the upper half part of the plastic bag is arranged below the bag bottom stabilizing device on the frame, the hand stroking feeding seat is provided with the hand stroking plate and the hand stroking controller, and a hand stroking feeder is arranged between the hand stroking feeding seat and the frame.

As a preferred technical scheme, an upper half stabilizing device is arranged at the upper half part of the plastic bag on the machine frame.

As a preferred technical scheme, the upper half part stabilizing device comprises an upper half part supporting table which is lower than the hand smoothing plate, an upper half part pressing table is movably arranged above the upper half part supporting table on the rack, the upper half part pressing table can be pressed on the upper half part supporting table, and the upper half part supporting table and the upper half part pressing table are respectively provided with the handle end stabilizing and avoiding openings; a pressing driver is arranged between the upper half pressing platform and the rack, and a yielding controller is arranged between the upper half supporting platform and the rack.

According to the preferable technical scheme, a lifting seat is vertically and movably mounted on the rack, the bag bottom stabilizing device, the hand smoothing feeding seat and the hand smoothing feeder are mounted on the lifting seat, and a lifting driver is arranged between the lifting seat and the rack.

As a preferred technical scheme, at least two clamping avoiding spaces arranged towards the vertical bend of the waist of the plastic bag are arranged on the upper half part stabilizing device.

As a preferred technical scheme, at least two bag bottom stabilizing devices are arranged on the rack in a left-right mode, middle stabilizing devices which correspond to the bag bottom stabilizing devices one to one are arranged on the rack, and the hand stroking plates on the same side of each middle stabilizing device share one hand stroking controller.

By adopting the technical scheme, the plastic bag handle folding device comprises a rack, wherein a bag bottom stabilizing device for stabilizing the lower half part of a plastic bag and a middle stabilizing device for stabilizing the middle part of the upper half part of the plastic bag are arranged on the rack, the middle stabilizing device and the bag bottom stabilizing device enable two handles of the plastic bag to form vertical bending arrangement respectively, and vertical bending lines of the handles are obliquely arranged relative to the length direction of the plastic bag; and hand stroking plates are respectively arranged on one sides of the racks, which are far away from the middle stabilizing device, of the handles, the hand stroking plates can be used for stroking the handles on the corresponding sides to be arranged below the middle stabilizing device, and hand stroking controllers are arranged between the hand stroking plates and the racks. The lower half part of the plastic bag is completely and stably fixed by the bag bottom fixing device, the middle part of the upper half part is fixed by the middle part fixing device, the middle part fixing device and the bag bottom fixing device jointly form an overall fixing structure of the plastic bag except for the lifting handle, and the lifting handle naturally bends due to no fixing effect. After the two hand smoothing plates move towards the middle stabilizing device in sequence, the two handles can be bent by respective vertical bending lines respectively, the two handles are bent below the plastic bag finally under the respective hand smoothing plates, and the end parts of the two handles can be in a lap joint state due to the inclined vertical bending lines. The handle is bent below the plastic bag, the handle is positioned at the inner side when the waist is folded, and the folded waist can be downwards turned and folded. Therefore, the characteristic that the plastic bag naturally bends can be easily utilized in the whole process, at the same time, the plastic bag is not a part which is stably controlled, or a part which is easily kept in a stable free state without being influenced by external force, the posture controllability is high, and the folding quality of the plastic bag is favorably improved.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.

Wherein:

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic view of the top carrier of FIG. 1 after supporting the upper half of the plastic bag;

FIG. 3 is a schematic top view of the hand feed block and upper part of the pallet of FIG. 2;

FIG. 4 is a schematic view of the handle plate of FIG. 3 with the upper portion thereof shown in an added view;

FIG. 5 is a schematic view of FIG. 4 with the addition of a top schematic bag pallet;

FIG. 6 is a schematic view of FIG. 5 after folding the handle;

FIG. 7 is a schematic top view of a folded plastic bag with the handle completed according to one embodiment of the present invention;

FIG. 8 is a schematic view of the bag of FIG. 2 with the handle ends clamped and the top carrier and the finger plate withdrawn from the upper half of the plastic bag;

FIG. 9 is a schematic top view of the bag bottom support structure and upper pallet half of the state of FIG. 8;

FIG. 10 is a schematic view of the upper half pallet and the upper half press stand of FIG. 8 in a state of replacing and holding the upper half of the plastic bag and the lifting seat being lowered;

FIG. 11 is a schematic structural diagram of a second embodiment of the present invention;

figure 12 is a schematic top view of the bag bottom support structure and upper tray table of figure 11;

FIG. 13 is a schematic view of the middle stabilizer of FIG. 11 after middle stabilization and upper saddle abduction;

FIG. 14 is a schematic top view of the bag bottom support structure and the central stabilizer of FIG. 13;

FIG. 15 is a schematic view of the handle of FIG. 13 after bending to stabilize the handle end;

FIG. 16 is a schematic view of the upper half pallet and the upper half press table of FIG. 15 stabilizing the upper half of the plastic bag and withdrawing the feeding seat;

FIG. 17 is a schematic view of the handle end of FIG. 16 with the handle end removed, the bag bottom removed and the lifting base lowered.

In the figure: 1-a frame; 2-bag bottom stabilizing device; 21-bag bottom support structure; 22-bag bottom stabilizing and pressing block; 23-bag bottom stability controller; 3-a middle stabilizer; 31-bag top pallet; 32-vertical bending reference edge; 33-a middle stabilizing base; 34-a middle first clamping finger; 35-middle second gripping fingers; 36-center grip actuator; 37-middle steady feeder; 4-stroking the palm; 41-a hand-stroking controller; 42-stroking the hand to feed the seat; 43-a hand-stroking feeder; 5-handle end stabilizing device; 51-handle end gripping blocks; 52-a clamp driver; 6-upper half of the stabilizer; 61-upper half pallet; 62-upper half pressing table; 63-a pressure holding driver; 64-a yield controller; 65-upper half bracket; 66-a jacking driver; 67-the handle end is stable and avoids the opening; 68-a stable avoidance port in the middle; 7-a lifting seat; 71-a lift drive; 8-mechanical clamping hands; 81-clamping an avoidance space; 9-plastic bag; 91-upper half; 92-lower half; 93-a handle; 94-vertical bend line.

Detailed Description

The utility model is further illustrated below with reference to the figures and examples. In the following detailed description, exemplary embodiments of the utility model are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive on the scope of the claims.

The first embodiment is as follows: as shown in fig. 1 to 10, the plastic bag handle folding device includes a frame 1, a bag bottom stabilizing device 2 for stabilizing a lower half portion 92 of a plastic bag 9 and a middle stabilizing device 3 for stabilizing a middle portion of an upper half portion 91 of the plastic bag 9 are provided on the frame 1, the middle stabilizing device 3 and the bag bottom stabilizing device 2 enable two handles 93 of the plastic bag 9 to form a vertical bending arrangement respectively, and a vertical bending line 94 of each handle 93 is obliquely arranged relative to the length direction of the plastic bag 9. This embodiment securing device 2 carries out comprehensive firm to plastic bag 9 the latter half 92 at the bottom of the bag, middle part securing device 3 stabilizes the middle part of plastic bag 9 the first half 91, middle part securing device 3 with securing device 2 has constituted the total stable structure of plastic bag 9 except that handle 93 jointly at the bottom of the bag, and handle 93 is because of not receiving the firm effect and naturally hangs down the crookedly, and the curved line 94 that hangs down naturally slant sets up.

This embodiment the securing device 2 at the bottom of the bag is including setting up bearing structure 21 at the bottom of the bag in the frame 1, bearing structure 21 carries out comprehensive bearing to the latter half 92 of plastic bag 9 at the bottom of the bag. Preferably, frame 1 is last to be located supporting structure 21 top is equipped with the firm briquetting 22 in bag bottom at the bottom of the bag, firm briquetting 22 in bag bottom with be equipped with the firm controller 23 in bag bottom between the frame 1, the firm controller 23 control in bag bottom the firm controller 23 in bag bottom presses and extremely back on the supporting structure 21 in bag bottom, can make plastic bag 9 the latter half 92 more firm. In this embodiment, the bag bottom stabilizing controller 23 is implemented by using an air cylinder, and the bag bottom stabilizing press block 22 is directly installed at the end of the piston rod. Although the present embodiment illustrates that the bag bottom stabilizing press block 22 and the bag bottom stabilizing controller 23 are disposed on the frame 1, the same technical effect can be achieved by disposing the bag bottom supporting structure 21 thereon.

The frame 1 is provided with a hand stroking plate 4 on one side of the handle 93 far away from the middle stabilizing device 3, the hand stroking plate 4 can strok the handle 93 on the corresponding side to be arranged below the middle stabilizing device 3, preferably, the hand stroking plate 4 is arranged in a high-low manner, so that the two hand stroking plates 4 can be conveniently formed and sequentially stroked. A hand smoothing controller 41 is arranged between each hand smoothing plate 4 and the rack 1. After the hand stroking controller 41 drives the hand stroking plate 4 to move towards the bag top supporting plate 31, the vertically bent handle 93 can be stroked to the position below the middle stabilizing device 3, namely the handle 93 is bent to the position below the plastic bag 9. The two handles 93 are sequentially stroked and fed by the two stroking plates 4, and the higher stroking plate 4 is preferably stroked and fed first. The end portions of the two handles 93 after being bent are easily overlapped by the oblique bending lines 94.

In this embodiment, the hand smoothing plate 4 is installed along being close to or far away from the middle part fixing device 3 in a sliding manner, the hand smoothing controller 41 can be realized by adopting a cylinder, an electric cylinder, a motor matched with chain belt transmission or a motor matched with gear and rack transmission and the like which can realize linear driving, and the embodiment is indicated by the cylinder. Besides, the stroking plate 4 can be mounted by swinging in the transverse direction, and the purpose of stroking the handle 93 can be achieved similarly.

This embodiment the range is equipped with two at least about on the frame 1 firm device 2 at the bottom of the bag, be equipped with on the frame 1 with firm device 2 one-to-one at the bottom of the bag middle part firm device 3, this embodiment can once only fold the operation to piling up plastic bag 9 like this, doubles and improves the operating efficiency. Preferably, the hand stroking plates 4 on the same side of each middle stabilizing device 3 share one hand stroking controller 41. This improves the synchronism of the operation, and allows the handle 93 of the plurality of stacks of plastic bags 9 to be folded quickly, and saves the driving energy.

In this embodiment, the middle securing device 3 includes a bag top supporting plate 31 disposed below the bag bottom securing device 2 and extending to the upper half 91 of the plastic bag 9, a release opening for releasing and supporting two handles 93 is disposed on the bag top supporting plate 31, and a vertical bending reference edge 32 for positioning a vertical bending line 94 of the handles 93 is disposed at the release opening on the bag top supporting plate 31. The release opening may be of a closed structure or an open structure, and this embodiment is illustrated by an open structure, that is, the bag top supporting plate 31 only has a plate structure between the two handles 93. In this embodiment, the bag top supporting plate 31 is used for supporting stably, and the two handles 93 which are not supported naturally form a vertical bending by the vertical bending reference edge 32.

Preferably, the frame 1 is provided with handle end stabilizing devices 5 for stabilizing the end portions of the two folded handles 93, and the two hand stroking plates 4 are respectively provided with handle stabilizing avoiding openings 67 corresponding to the handle end stabilizing devices 5. For the present embodiment, the bag top supporting plate 31 is used for supporting the middle portion stably, and the handle is also provided on the bag top supporting plate 31 to stably avoid the opening 67.

The handle end stabilizing means 5 of this embodiment comprises handle end gripping blocks 51 movably mounted above and below the upper half 91 of the plastic bag 9, respectively, and a gripping actuator 52 is provided between each of the handle end gripping blocks 51 and the frame 1. After the handle 93 is bent, in the present embodiment, the handle end clamping block 51 with a small clamping area is used to directly clamp and fix the overlapped part of the bent handle 93 through the handle stable avoiding opening 67, and other parts, that is, the parts where the bag top supporting plate 31 and the finger smoothing plate 4 are located, are not subjected to the clamping force. In this embodiment, the two handle end clamping blocks 51 are also installed in a sliding manner, so that the clamping driver 52 is also implemented by using a cylinder, an electric cylinder, a motor matched with a chain belt transmission or a motor matched with a rack and pinion transmission, which can implement linear driving, and the cylinder is illustrated in this embodiment; of course, both handle end clamping blocks 51 can also be realized in a swinging mounting manner.

A hand smoothing feeding seat 42 movably mounted in a direction close to or far away from the upper half part 91 of the plastic bag 9 is arranged below the bag bottom stabilizing device 2 on the frame 1, the hand smoothing feeding seat 42 is provided with the hand smoothing plate 4 and the hand smoothing controller 41, and for the embodiment that the bag top supporting plate 31 is adopted to support the upper half part 91 of the plastic bag 9, the bag top supporting plate 31 is further mounted on the hand smoothing feeding seat 42. A hand feeder 43 is arranged between the hand feeding seat 42 and the frame 1.

After the hand feeder 43 drives the hand feeding seat 42 to feed to the upper half part 91 of the plastic bag 9, the bag top supporting plate 31 can support the middle part of the upper half part 91 of the plastic bag 9, and the hand smoothing plate 4 can be bent by a handle 93; after the handle end stabilizing device 5 stabilizes the handle 93, the hand feeder 43 drives the hand feeding seat 42 to be far away from the upper half part 91 of the plastic bag 9, and the bag top supporting plate 31 and the hand smoothing plate 4 can be withdrawn from the position of the handle 93 and hidden under the bag bottom stabilizing device 2. After the handle 93 is folded, the end part of the handle 93 receives the stabilizing effect of the handle end stabilizing device 5, and the bag top supporting plate 31 and the hand smoothing plate 4 are withdrawn to form the withdrawing action, so that the upper half part 91 of the handle 93 which is bent can not be influenced. The hand feeder 43 can also be realized by a cylinder, an electric cylinder, a motor, a chain belt transmission or a gear and rack transmission, and the like, which can realize linear driving, and this embodiment is illustrated by the motor matching with the chain belt transmission.

Preferably, an upper half stabilizing device 6 is disposed on the frame 1 at the upper half 91 of the plastic bag 9 for integrally stabilizing and controlling the upper half 91 of the handle 93 after bending. In this embodiment, the upper half stabilizing device 6 includes an upper half supporting table 61 lower than the stroking board 4, an upper half pressing table 62 is movably mounted on the frame 1 above the upper half supporting table 61, the upper half pressing table 62 can be pressed and held on the upper half supporting table 61, and the upper half supporting table 61 and the upper half pressing table 62 are also respectively provided with the handle stabilizing avoiding opening 67; a pressing driver 63 is arranged between the upper half pressing platform 62 and the frame 1.

After the pressing driver 63 drives the upper half pressing table 62 to press and hold the upper half supporting table 61, the two pressing drivers can press and hold the upper half part 91 of the plastic bag 9, namely, the whole external force is formed to be stable, and the bent handle 93 is not easily influenced when the waist is folded in half subsequently. In this embodiment, the upper half pallet 61 is implemented by adopting a vertical sliding installation mode, the pressing driver 63 is correspondingly implemented by adopting an air cylinder, an electric cylinder, a motor matched with a chain belt transmission or a motor matched with a rack and pinion transmission, and the like, which can realize linear driving, and the air cylinder is used for illustration in this embodiment; of course, the upper half pressing table 62 can also be realized by adopting a swinging installation mode, and the upper half pressing table is pressed and held on the upper half supporting table 61 after swinging, so that the same pressing and holding stabilizing effect can be realized.

Preferably, a yielding controller 64 is arranged between the upper half pallet 61 and the rack 1. Before the handle 93 is folded, the yielding controller 64 drives the upper half supporting table 61 to yield along the direction away from the bag bottom stabilizing device 2, so that the influence of the upper half supporting table 61 on the vertical bending of the handle 93 is avoided, and the handle 93 is bent more smoothly. The yielding controller 64 can also be realized by adopting a cylinder, an electric cylinder, a motor matched chain belt transmission or a motor matched gear rack transmission and the like which can realize linear driving, and the embodiment is shown by the cylinder.

In addition, this embodiment add first bracket 65 on frame 1, first bracket 65 with set up between frame 1 give way controller 64, first saddle 61 movable mounting is in first bracket 65, be equipped with jacking driver 66 between first saddle 61 and first bracket 65. The upper half supporting platform 61 can eliminate the influence of the height difference with the bag top supporting plate 31 through the jacking action, and is better matched with the upper half pressing platform 62 to form stable pressing and holding on the upper half part 91 where the lifting handle 93 is positioned.

A lifting seat 7 is vertically and movably mounted on the frame 1, the bag bottom stabilizing device 2, the hand feeding seat 42 and the hand feeder 43 are mounted on the lifting seat 7, and for the structure of the bag bottom stabilizing device 2 in this embodiment, only a bag bottom supporting structure 21 is mounted on the lifting seat 7; a lifting driver 71 is arranged between the lifting seat 7 and the frame 1. Thus, the bag bottom supporting structure 21, the hand stroking feeding seat 42, and the bag top supporting plate 31 and the hand stroking plate 4 thereon in the bag bottom stabilizing device 2 can be lifted together with the lifting seat 7. After the bag top supporting plate 31 and the hand smoothing plate 4 are withdrawn, the lifting driver 71 drives the lifting seat 7 to descend, the lower half portion 92 of the support is lost, and natural bending is formed under the action of self flexibility and self weight, namely, the plastic bag 9 automatically finishes the half of downward overturning and folding by virtue of the action of self flexibility and self weight. At this time, a large space is left around the plastic bag 9 by the descending of the lifting seat 7, and the plastic bag 9 can be folded in half by applying a force to the lower half portion 92 toward the bottom of the upper half portion pallet 61.

Preferably, last half securing device 6 is last to be equipped with two at least towards the clamp that plastic bag 9 waist hangs down the bend and sets up and get and dodge space 81, press from both sides to get and dodge space 81 and can make things convenient for follow-up mechanism to adopt mechanical tong 8 to press from both sides and get plastic bag 9, mechanical tong 8 extends press from both sides the process of getting and dodging space 81, and the finger that presss from both sides that is in the low level can be stroked down the bag bottom to first half saddle 61 draws close naturally, and after plastic bag 9 was cliied to mechanical tong 8, plastic bag 9 has formed the waist fifty percent discount. After the upper half pressing table 62 is released from pressing, the plastic bag 9, which has the waist folded and the inner handle 93 stably and orderly arranged, can be directly sent to the subsequent process for operation.

The lower half portion 92 of the plastic bag 9 delivered by the embodiment is completely fixed by the bag bottom fixing device 2, that is, the lower half portion 92 of the plastic bag 9 is supported by the bag bottom supporting structure 21 and then fixed by the bag bottom fixing pressing block 22. After the hand feeding seat 42 is driven to move close to the upper half part 91 of the plastic bag 9, the bag top supporting plate 31 supports the middle part of the plastic bag 9, and two handles 93 of the plastic bag 9 naturally form a vertical bending state at the release opening; the upper half supporting platform 61 can be retracted, and the normal vertical bending of the two handles 93 of the plastic bag 9 is not influenced. After the two hand stroking plates 4 move towards the bag top supporting plate 31 in sequence, the two handles 93 can be smoothly bent below the plastic bag 9. Then, the upper half supporting platform 61 returns, and in the handle end stabilizing device 5, the handle end clamping blocks 51 penetrate through the handle stabilizing avoiding openings 67 together to directly clamp and fix the lap joint parts of the two handles 93. The bag top supporting plate 31 and the hand smoothing plate 4 are withdrawn from the handle 93 position by utilizing the hand smoothing feeding seat 42 and the hand smoothing feeder 43, the upper half pressing table 62 and the upper half supporting table 61 replace the handle end clamping block 51 to press and stabilize the whole upper half part 91 of the plastic bag 9, and the handle end clamping block 51 and the bag bottom stabilizing pressing block 22 return. The lifting driver 71 drives the lifting seat 7 to drive the bag bottom bearing structure 21, the hand smoothing feeding seat 42 and the like in the bag bottom stabilizing device 2 to wholly descend, the lower half portion 92 of the lost bearing naturally sags, and the half portion of downward overturning and folding is naturally completed. Follow-up mechanical tong 8 utilizes press from both sides and get dodge space 81, gets the in-process and accomplish plastic bag 9 waist fifty percent discount in step to after the waist fifty percent discount, can be at once with waist fifty percent discount, and the plastic bag 9 of inboard handle 93 gesture stable and orderly, directly send to the subsequent handling and carry out the operation, the process links up well, and is efficient.

In summary, the whole operation process of the embodiment makes full use of the characteristic that the plastic bag 9 can naturally sag and bend, the plastic bag 9 is not a part which is stably controlled at each moment, or a part which is kept in a stable free state without being influenced by external force, the posture controllability is high, and the folding quality of the plastic bag 9 is favorably improved.

Example two: as shown in fig. 11 to 17, the present embodiment differs from the first embodiment in that: the middle stabilizing device 3 comprises a middle stabilizing seat 33 movably mounted on the frame 1 along a direction close to or far away from the bag bottom stabilizing device 2, a middle first clamping finger 34 positioned below the upper half part 91 of the plastic bag 9 is movably mounted on the middle stabilizing seat 33, a middle second clamping finger 35 is mounted on the frame 1 above the upper half part 91 of the plastic bag 9, and the middle second clamping finger 35 and the middle first clamping finger 34 can clamp and fix the middle of the upper half part 91 of the plastic bag 9. A middle clamping driver 36 is arranged between the middle second clamping finger 35 and the frame 1, and a middle stable feeder 37 is arranged between the middle stable seat 33 and the frame 1.

After the middle stabilizing feeder 37 drives the middle stabilizing base 33 to feed to the upper half 91 of the plastic bag 9, the middle first clamping finger 34 can be located below the upper half 91 of the plastic bag 9, and after the middle clamping driver 36 drives the middle second clamping finger 35 to move, the middle first clamping finger 34 and the middle second clamping finger can clamp the middle of the upper half 91 of the plastic bag 9. After the middle part of the upper half part 91 of the plastic bag 9 is clamped, because the lower half part 92 of the plastic bag 9 is integrally stabilized, two triangular areas between the middle part of the upper half part 91 of the plastic bag 9 and the lower half part 92 of the plastic bag are also stabilized, that is, the middle stabilizing device 3 and the bag bottom stabilizing device 2 jointly form an overall stabilizing structure of the plastic bag 9 except for the handle 93, the handle 93 naturally bends because of not being stabilized, and the bent line 94 naturally slants.

Preferably, the middle second clamping finger 35 is also mounted on the middle stabilizing base 33 so as to be able to advance and retract with the middle first clamping finger 34. Of course, the middle second gripper finger 35 can also be mounted directly on the machine frame 1, and after the middle first gripper finger 34 has been fed under the upper half 91 of the plastic bag 9, it is moved directly downwards to form a clamping action with the middle first gripper finger 34. The middle stabilizing base 33 is preferably slidably mounted, and the middle stabilizing feeder 37 can be realized by a cylinder, an electric cylinder, a motor-matched chain belt transmission or a motor-matched gear-rack transmission, which can realize linear driving, and the embodiment is illustrated by the cylinder.

Based on the difference of the middle securing device 3, the handle end securing device 5 of this embodiment only uses the handle end clamping block 51 located below, and the handle end clamping block 51 located below can directly secure the bent handle 93 on the middle first clamping finger 34.

The upper half fixing device 6 of the present embodiment has substantially the same structure as that of the embodiment, that is, includes an upper half supporting platform 61, an upper half pressing platform 62, a pressing driver 63, an upper half supporting seat 65, a yielding controller 64, a lifting controller, and the like. Before the middle fixing device 3 is clamped, the upper half pallet 61 may be lifted and moved toward the bag bottom fixing device 2 to serve as a platform for supporting the upper half 91 of the plastic bag 9, so that the middle fixing device 3 can be clamped smoothly. After the middle fixing device 3 is smoothly clamped, the upper half pallet 61 is retreated and descended to form an avoidance space for folding the subsequent handle 93 and the like. The middle first clamping finger 34 and the middle second clamping finger 35 are advanced and retreated from the middle of the upper half pallet 61, so the upper half fixing device 6 of the present embodiment is different from the first embodiment mainly in that: first saddle 61 with first pressure is equipped with the middle part that runs through the setting on the platform 62 and stabilizes and dodge mouthful 68, just the middle part stabilizes and dodges mouthful 68 and can double as the handle stabilizes and dodges mouthful 67 setting.

In addition, the present embodiment shows that the middle stabilizer 33 is slidably mounted on the upper half bracket 65, and the middle stabilizer feeder 37 is also mounted on the upper half bracket 65, so that the space for arrangement of the structure can be saved. Of course, the central steady rest 33 and the central steady feeder 37 can also be additionally arranged on the machine frame 1.

The lower half portion 92 of the plastic bag 9 delivered by the present embodiment is also completely stabilized by the bag bottom stabilizing device 2, and the upper half portion supporting platform 61 temporarily supports the upper half portion 91 of the plastic bag 9 by being lifted and moved close to the bag bottom stabilizing device 2. The middle clamp actuator 36 first moves the middle second clamp finger 35 to be raised to a position higher than the plastic bag 9, and then the middle first clamp finger 34 is fed below the upper half 91 of the plastic bag 9 by the middle steady feeder 37, and the middle clamp actuator 36 drives the middle second clamp finger 35 to be lowered, so that the middle of the upper half 91 of the plastic bag 9 can be clamped. The upper half pallet 61 is retracted and lowered and during its evacuation the middle steady feeder 37 keeps feeding synchronously to offset the evacuation stroke of the upper half pallet 65. The handles 93 which are then without support form a natural vertical bend, while the yielding of the upper pallet half 61 does not affect the normal vertical bends of the handles 93 of the plastic bag 9. After the two hand stroking plates 4 move towards the bag top supporting plate 31 in sequence, the two handles 93 can be smoothly bent below the plastic bag 9. The lower handle end gripping block 51 then presses the overlapping end portions of the two handles 93 directly under the middle first gripping finger 34. The upper half supporting table 61 directly moves towards the bag bottom stabilizing device 2 to reach the lower part of the upper half part 91 of the plastic bag 9, the hand stroking plate 4 withdraws from the handle 93 position by utilizing the hand stroking feeding seat 42 and the hand stroking feeder 43, the upper half pressing table 62 and the upper half supporting table 61 move oppositely to replace the handle end clamping block 51 and the middle stabilizing device 3, and the whole upper half part 91 of the plastic bag 9 is pressed and stabilized. The handle end clamping block 51, the bag bottom stabilizing pressure block 22 and the middle stabilizing device 3 return. The lifting driver 71 drives the lifting seat 7 to drive the bag bottom bearing structure 21, the hand smoothing feeding seat 42 and the like in the bag bottom stabilizing device 2 to wholly descend, the lower half portion 92 of the lost bearing naturally sags, and the half portion of downward overturning and folding is naturally completed. Follow-up mechanical tong 8 utilizes press from both sides and get dodge space 81, gets the in-process and accomplish plastic bag 9 waist fifty percent discount in step to after the waist fifty percent discount, can be at once with waist fifty percent discount, and the plastic bag 9 of inboard handle 93 gesture stable and orderly, directly send to the subsequent handling and carry out the operation, the process links up well, and is efficient.

The whole operation process of the embodiment also makes full use of the characteristic that the plastic bag 9 can naturally sag and bend, the plastic bag 9 is not a part which is stably controlled at each moment, or a part which is kept in a stable free state without being influenced by external force, the posture controllability is high, and the folding quality of the plastic bag 9 is favorably improved.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. Plastic bag handle folding device, including the frame, its characterized in that: the machine frame is provided with a bag bottom stabilizing device for stabilizing the lower half part of the plastic bag and a middle stabilizing device for stabilizing the middle part of the upper half part of the plastic bag, the middle stabilizing device and the bag bottom stabilizing device enable two handles of the plastic bag to form vertical bending arrangement respectively, and the vertical bending lines of the handles are obliquely arranged relative to the length direction of the plastic bag; and hand stroking plates are respectively arranged on one sides of the racks, which are far away from the middle stabilizing device, of the handles, the hand stroking plates can be used for stroking the handles on the corresponding sides to be arranged below the middle stabilizing device, and hand stroking controllers are arranged between the hand stroking plates and the racks.

2. A plastic bag handle folding apparatus according to claim 1, wherein: the middle stabilizing device comprises a bag top supporting plate which is arranged below the bag bottom stabilizing device and extends to the upper half part of the plastic bag, the bag top supporting plate is provided with a release port for releasing and supporting two handles, and a vertical bending reference edge for positioning a vertical bending line of the handles is arranged at the position, located at the release port, on the bag top supporting plate.

3. A plastic bag handle folding apparatus according to claim 1, wherein: the middle stabilizing device comprises a middle stabilizing seat movably arranged on the rack along the direction close to or far away from the bag bottom stabilizing device, a middle first clamping finger positioned below the upper half part of the plastic bag is movably arranged on the middle stabilizing seat, a middle second clamping finger is arranged on the rack above the upper half part of the plastic bag, and the middle second clamping finger and the middle first clamping finger can clamp and fix the middle part of the upper half part of the plastic bag; a middle clamping driver is arranged between the middle second clamping finger and the rack, and a middle stable feeder is arranged between the middle stable seat and the rack.

4. A plastic bag handle folding apparatus according to claim 1, wherein: the frame is provided with handle end stabilizing devices for stabilizing the end parts of the two folded handles, and the two hand smoothing plates are respectively provided with handle end stabilizing and avoiding openings corresponding to the handle end stabilizing devices.

5. A plastic bag handle folding apparatus according to claim 4, characterized in that: a hand stroking feeding seat movably mounted in the direction close to or far away from the upper half part of the plastic bag is arranged below the bag bottom stabilizing device on the frame, the hand stroking plate and the hand stroking controller are mounted on the hand stroking feeding seat, and a hand stroking feeder is arranged between the hand stroking feeding seat and the frame.

6. A plastic bag handle folding apparatus according to claim 5, characterized in that: and an upper half stabilizing device is arranged at the upper half part of the plastic bag on the rack.

7. A plastic bag handle folding apparatus according to claim 6, characterized in that: the upper half part stabilizing device comprises an upper half part supporting table which is lower than the stroking plate, an upper half part pressing table is movably arranged above the upper half part supporting table on the machine frame and can be pressed on the upper half part supporting table, and the upper half part supporting table and the upper half part pressing table are respectively provided with the handle end stabilizing and avoiding openings; a pressing driver is arranged between the upper half pressing platform and the rack, and a yielding controller is arranged between the upper half supporting platform and the rack.

8. A plastic bag handle folding apparatus according to claim 6, characterized in that: the bag bottom stabilizing device, the hand smoothing feeding seat and the hand smoothing feeder are mounted on the lifting seat, and a lifting driver is arranged between the lifting seat and the rack.

9. A plastic bag handle folding apparatus according to claim 8, wherein: the upper half part stabilizing device is provided with at least two clamping avoiding spaces arranged towards the vertical bend of the waist part of the plastic bag.

10. A plastic bag handle folding apparatus according to claim 1, wherein: the bag bottom stabilizing devices are arranged on the rack in a left-right mode, the middle stabilizing devices which correspond to the bag bottom stabilizing devices one to one are arranged on the rack, and the hand stroking plates on the same sides of the middle stabilizing devices share one hand stroking controller.